网络传输中采用隐蔽通道实现秘密通信

Implementation of Secret Communication with Covert Channels in Network Traffic

秘密通信是指要隐藏通信的实际存在。在网络传输中利用隐蔽通道实现秘密通信,涉及到网络安全和采用数据隐藏技术实现网络隐私。主要讨论隐蔽通道的研究框架、分类、评估,以及秘密通信协议的设计问题。隐蔽通道可以分为结构模式、行为模式和内容模式,比较各种不同通道例证,阐明结构模式和行为模式通道更容易被消除,而内容模式则更为可靠并且具有较高的带宽。多种通道模式混用将更适合于秘密通信协议的开发。

Secret communication is to hide the existence of communication. This work relates network security and privacy with data hiding techniques, focusing on secret communication using covert channels in network traffic. The framework, classification and evaluation of covert channels and design issues in secret communication protocols were investigated. Covert channels were divided into structure-mode, behavior-mode and content-mode. The comparison of different channels illustrates that channels in structure-mode and behavior-mode are generally more apt to be eliminated while those in content-mode are more reliable and of high-bandwidth. A combination of different kinds of channels should be appropriate for developing secret communication protocols.